between very anxious parents, their terrified children. hugging each other, crying, after the ordeal is over. abc's steve osunsami is live in decatur, georgia, in front of the grade school with all the latest. good morning, steve. >> reporter: good morning, lara. students are not going to be returning to this school today. instead, they're heading to the high school with the big kids. police are here, turning parents away, while they continue to investigate. this morning, the man accused of shooting up the school has a face and a name. abc news has learned he's michael brandon hill, a 20-year-old with a history of mental health issues. overnight, police searched hill's home. the bomb squad blowing open his trunk. this frightening and all-too familiar scene began at 12:45 tuesday. police say the young man followed someone through the doors of atlanta's ronald e. mcnair academy, where 800 children were attending pre-k through fifth grade.